Loom attachment



sept. 22, 1925. 1,554,342

' W. L. GILBERT LOOM ATTACHMENT Filed Sent. 15. 1924 Inventor: y

Patented Sept.r 22, 1925.

WILLIAM L. GILBERT, or AUBURN, MAINE.

LOOM ATTACHMENT.

Application filed September'l, 1924.v Serial No. 737,698,

To @ZZ fr0/wm t may concern:

Be it known that I, VILLIAM L. GILBERT,

a citizen of the United States, residing at Auburn, inthe county ofAndroscoggin and State of Maine, have invented certain new and useful improvements in Loom Attachments, of which the following is a specifica# tion. I My invention relates t-o looms and par ticularly to an attachment to be applied to looms for the prevention of knots, snarls and bunches of various sorts which are liable to form in connection with the warp threads when the loom is running.

Such obstructions sometimes cause the warp threads to break and under some circumstances result in the failure of the dropwires of the loom stop motion to drop and stop the loom, so that the loom instead of stopping, continues to run without notice to the Weaver that bad cloth is being produced. y

For the purpose of keeping the warp free from knots and obstructionsof this sort l make use of a so called flattened lease rod which extends betweenthe warp threads, the lease rod being subjected to a rocking or twisting motion actuated by one of the moving parts of the loom and which tends to continually separatethe warp threads and allow them to approach each other. l

As herein shown the lease redis 4mounted at each end on a springpressed and longitudinally movable support so that when the warp threads become tangled and are not separated byy the rocking motion of the lease rod, the support is made to slide longitudinally of the threads by contacting with the lease rod.

Means are provided so that the lease rod when moved a certain limited distance, by such an obstruction, connects with the meehanism for stopping they loom.

The snarls and tangles referred to which are liable to happen particularly in cotton looms which result in the abnormal conditions found in the working of the loom and which my invention is designed to correct, are as follows, and arelpgiven in the order of their frequency. f

l. Certain defects of the warp are caused by so called, hard sizing which is the improper mixing of the starchor sizing in vthe Slasher.

This causes a bunch on'the yarn which kthe flying ends become will not pass through the opening in the drop-wires. f

If these yarns become snarled around the drop-wirethe obstructions are liable to collect so that the drop-wires will not drop to stop the loom. f

In such cases the drop-wires are liable to stay up and theloom will be kept running continuously making bad cloth and sometimes necessitating the removal' of the warp beam and the redrawing of the warp.

2. The crossing of the warp threads. lhere the warp threads cross .and get snarled together they often cause breaks which are detected by the drop-wires which stop the operation of the loom. l

8. A further cause of trouble is the knots which are frequently made in the `warp threads by the spinners and weavers.

In passing throughthe Slasher these knotted threads become loaded down with starch, tangled with the warp threads sometimes causing the breaking of the threads .and sometimes causing larger snarls which prevent the wire from dropping and stopping the loom.

a. A still further dilculty is found in the fibers which are always floating about a cotton mill and which cause bunches to collect on the warp threads.

These bunches as they kpass through the slasher are flattened out and sometimes cause large snarls among the drop-wires where they fail to pass through the openings.

The result may be the holding up of the drop-wiresfrom dropping and stoppingthe loom.

All of the troubles that I have set forth and others not specified, are remedied by my device whereby the flattened lease rod being rocked or twisted continuously is always and tending to clearthem from any snarls or bunches. When the warp threads get- Ystuck together and are brought in contact with the lease rod the latter is moved forward horizontally and made to operate my Vstop motion and stop the loom.k l

I have illustrated my invention by means of theaccompanying drawing in which Fig. l is an end view of the loom,

Fig. 2 is a perspective vie-w of my lease rod, its supports and the connecting parts. Fig. 3 is a section on the line 3+?) of Fig. 2. Fig. t is a-side elevation of the chamfered vmoving the warp threads across each other end of the extension ot the horizontally movable rod,

Fig. is a cross section through the lease rod yand Fig. 6 is the saine with the lease rod in a more vertical position.

Fig. 1 shows a general elevation of the loom 1 in which 2 is the lathe, 3 is the lathe sword, L /l. are the harnesses, 5 is the warp, 6 is the warp beam and 7 is the arch ot the loom, 8 represents the lease rod which is interposed between the strands of the warp at a point beyond their crossing point and which extends the entire'width ot the cloth. Each end ot the lease rod is s upported by a support 9 having lan opening 10 therethrough, through which passes the end or the lease rod.

The lease rod is so constructed and mounted that when the loom is in operation it will be subjected to a tilting or rocking motion. As herein shown, vertical rod 1? extends through each end ot the lease rod, the upper end of the rod 13 having an adjusting screw engaging the screw thread 1Q, the lower end ot the rod 13 being provided with an eye 14 which engages an eye 15 on one end ot a horizontal rod 16. On the other end ot the rod 16 is an eye 16 by which the rod 1G is pivoted to a bracket secured to the lathe f2.

Thus the vibration ot the 'lathe exerts a longitudinal motion of the rod 16 and thence through the vertical rod 13 a rocking motion is imparted to the lease rod 8.

rlhe eiect of the rocking motion of the tlat lease rod k8 is to continue to separate the warp threads and to allow them to return to their first position forming a cross motion which tends continually to remove knots and snarls which may be 'formed in the warp.

The usual warp stop motion is applied to the loom by means ot a series ot dropwires Lle() which are strung along the bar 50.

Each ot' the warp threads 5 is made to pass through a hole in one of the drop-wires 4.-() so that when a warp thread breaks vthe drop-wire will be allowed to tall.

lVhen one of the wires 40 is allowed to drop by reason ot the tact that it is not supported by thewarp thread 5 Aor any ot them, it falls to the position shown in dotted lines in Fig. 2. Then 'in this position it enters the path of the vibrating feeler rod and is held by being interposed between the teeler bar 30 and the iixed bar 31 and the loom is thereupon stopped.

.here are certain contingencies in the operation of the loom where hardened starch and similar materials collect around the drop-wires and prevent them from falling and stopping the loom. lhen such con tingencies happen the loom is liable to continue to run without notice to the weaver that there is any trouble and as a result much bad cloth is woven which is many times quite impossible to mend..

I provide that when obstructions come against the lease rod by the snarling of the yarn, by masses of sizing mixed with the yarn or by other obstructions becoming mixed with the warp yarns the lease rod will slide. longitudinally to a limited eX- tent and thereby operate a very sensitive mechanism by which the loomy will be stopped.

For the purpose or operating the stop ino-tion l. extend forward from the supports S) rod Q2 which extends toi-ward passing through an upright 21 formed on one of the lugs on the horizontal rails 20.

For the purpose of giving a slight springtension l coil a light spring Q3 about the rod Q2.

Means are provided by `which the loom is stopped when the supports 9 are moved horizontally al limited distance. For this purpose l provide on the end ot the rod 22 an extension Ll-.l formed on the side 01"' the collar Ll1 which is adjustably secured by a set screw ft2 at the end of the rod 22.

The extension is formed of a flattened bar having a narrow 'tace L13 chamfered oit in such a way that when it slides torward beneath the arm GO it will litt the same and consequently depress the arm 6,3 on lthe opposite side ot the hub 64 to `which both arms are secured. rlhe hub 64 is pivoted on a spindle 62 which passes through the hubs v64k and 65 substantially parallel with the rod Q2.

The hub 65 is formed on the end oit the bracket 66 the latter being secured to the loom 1 by a nut 67 which passes through it. The stop arm 68 on the opposite side ot' the hub from the arm 60 is normally held at an inclination so that it is out of the path ot the vibrating feeler bar 80.

yThen the extension 40 is moved longitudinally by the rod 22 it lifts the arm 60 and depresses the arm 63 as shown by dotted lines in Fig. 2. The arm 63 is when depressed, in the path of the vibrating tceler bar 30. The arm 63 is thus held between the eeler bar 30 and the fixed bar 31 and the loom is stopped.

For the purpose ot keepinga light tension between the bar 60 and the chamfered surtace Ll5 a light spring 61 is interposed between the end ot the bar 60 and the bracket 66.

Itwvill be seen that the rocking action ot' the lease rod 8 whi-le the loom continues to run has the eiiect ot rubbing the warp threads 5 with a cross motion against each other and this cross motion effects the clearing ot the warp threads in many cases and allows the loom to weave the cloth tree from imperfections.

As already stated' there are occasions when the warp threads are badly snarled, loaded with starch sizing and other like obstructions accumulate on the drop-wires so that the latter refuse to drop and the loom continues to run.

By combining a stop motion herein shown, with a continually rocking flat lease rod I have found that the snarls and obstructions are worked out as the rocking lease rod moves horizontallyl in contact with the warp.

As a matter of fact I find that the combined action of the flat lease rod always rocking and in the state of agitation combined with the 'stop motion operated by the horizontal motion of the lease rod has the effeet on most looms of straightening out most of the bad weaving and enables the loom to run continuously and ina-ke good cloth substantially all the time.

I claim 1. In a loom, the combination of a rocking lease rod formed to create a cross motion between the opposing threads, supports for the ends of said lease rod, means for allow ing said supports to move horizontally, a chamfered element rod moved horizontally by the motion of said support, a horizontal rod substantially parallel with said chamfered element rod, a sleeve on said horizontal rod, a projecting arm on said sleeve contacting with said chamfered element rod to twist said sleeve and a stopping arm on said sleeve adapted to enter the path of the stop motion vibrating rod thereby to stop the loom.

2. In a loom, the combination of a rocking lease rod, a support therefor, a movable rod connected with said support and slidable longitudinally of the warp, a chamfered eX- tension bar for adjustably connecting with said movable rod, a fixed rod substantially parallel with said extension, and movable rod, a sleeve adapted to contact with the chamfered portion of said extension, a stop arm projecting from said sleeve normally out of the path of the vibrating feeler bar and adapted to be brought into said path by the longitudinal motion of said extension tostop the loom.

3. In a loom the combination of a rocking lease rod, a support therefor, a movable rod connected with said support and slidable longitudinally of the warp, a chamfered extension bar for adjustably connect-ing ,with said movable rod, a fixed rod substantially parallel with said extension, and mov able rod, a sleeve adapted to connect with said extension, a stop arm projecting from said sleeve normally out ofthe path of the vibrating feeler bar and adapted to be brought into said path by the longitudinal motion of said extension to stop the loom.

WILLIAM L. GILBERT. 

